No, they are not. A position of base_link jumps from place to place, a few meters jumps. But what I’ve observed is that, when I restart Husarion, and start this tutorial, everything looks ok, and after a while, again base_link position starts to destabilize, after launching other tutorials for example. This problem occurs in all tutorials.
I have one more question. How is base_link connected to odom frame? How the position of base_link is calculated relative to odom. I assume that is done by robot_localization package.